Shoulder patient specific instrument
AssigneeTornier SAS
InventorsPierric Deransart, Emmanuel Francois Marie Lizee, Delphine Claire Michelle Henry, Jean Chaoui, Gilles Walch, Pascal Boileau
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Abstract
A patient specific glenoid guide is provided to facilitate properly aligned implantation of a glenoid prosthesis into a patient. The guide shape is designed preoperatively based on the unique configuration of the scapula of the patient. The guide orientation is chosen preoperatively based on one or more of the bone structure of the patient, the wear pattern of the patient's glenoid cavity, the anchoring means of the glenoid prosthesis, or other aspects.
Claims32
A patient specific glenoid guide for attachment to a scapula of a patient, the glenoid guide comprising:
- a guide feature;
- at least three arms having a first end coupled with the guide feature and a second end disposed away from the guide feature;
- and
- at least three peripheral pegs, each peripheral peg extending from the second end of a corresponding arm and comprising an engagement surface;
- wherein the engagement surface is configured to engage the scapula of the patient to provide a snap fit attachment onto the scapula.
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A surgical kit comprising:
- a patient specific glenoid guide, the glenoid guide comprising:
- a guide feature;
- a plurality of arms extending from the guide feature;
- and
- a plurality of peripheral pegs, each of the plurality of peripheral pegs extending from a corresponding arm, each of the plurality of peripheral pegs comprising an engagement surface;
- and
- a three dimensional model of a patient's scapula comprising a glenoid cavity border;
- and
- wherein the engagement surfaces of the patient specific glenoid guide are configured to engage the glenoid cavity border of the model by a snap fit.
A method of guiding a glenoid prosthesis, the method comprising:
- pre-operatively determining a position and an orientation of guide feature of a glenoid guide based on a specific patient's scapula, the glenoid guide comprising:
- a plurality of arms extending from the guide feature;
- and
- a peripheral peg extending from each of the plurality of arms, the guide feature disposed inward of the peripheral pegs;
- engaging the glenoid guide with the scapula;
- inserting a pin having an axis through the guide feature to or through the scapula.
Dependencies are inferred from the claim text.